aluminum alloy in the electronic product shell application trend driven by Apple, iPhone6 and iPhone7 are using a higher grade 7000 series aluminum alloy (Al-Zn-Mg), but the Samsung GalaxyS6 is used in the 6013 aviation grade aluminum alloy (Al-Mg -Si-Cu). In addition, the phone aluminum alloy shell 6063 aluminum alloy and 6061 aluminum alloy applications are more.